The Octane Number is retained owing to HZSM 5 � � s excellent ability of aromatization, isomerization and alkylation.HZSM-5沸石对汽油的降烯烃作用得益于其优异的芳构化 、 异构化和烷基化性能.These derivatives are readily obtained by alkylation of 2 - mer...
These derivatives are readily obtained by alkylation of 2 - mercaptopyridine and alkyl halides under alkaline conditions.这些衍生物可以容易地在碱性条件下通过 2- 巯基吡啶和卤代烷的烷基化而得到.The different contents of various alkylation products were ob...
The railway line, due for closure, has been granted a six-month reprieve.本应停运的铁路线获准多运行6 个月。reprieve a condemned prisoner缓期执行被判罪囚犯的刑罚The family have won a temporary reprieve from eviction.这个家庭暂时免于被逐出.Commutation is distin...
Digital continuous clinometer is an accurate device to measure well trajectory.数字式连续测斜仪是用于测量井身轨迹的精密仪器.We started to use a simple clinometer, graphical reduction of distance to draw maps in caves.我们开始使用一种简单的测斜器, 减少图解距离,并绘...
Give me four eights and two fours, please.请给我四张8分邮票和两张4分邮票.She crawled on all fours over to the window.她爬到窗边。Little shop - girls went fluttering by in pairs and fours , chattering, laughing.年轻的女店员三三两两蹦蹦跳跳从身边走过, 一边走一边说笑着....
During the 1980s Britain became a very materialistic society.20世纪80年代期间，英国变成一个物质至上的社会。Materialistic dialectics is an important part of constituting Marxism.唯物辩证法是马克思主义的重要组成部分.She made him both soft and materialistic.她把他变...
English has hurt me a thousand times, but I still regard it as my first love.英语伤我千百遍，我待英语如初恋。"How much is he paying you?" — "Oh, five thousand." —"Not bad."“他给你多少钱？”——“哦，5,000。”——“挺不错嘛。”Up to twenty thousand students pai...
There is a trend for knocking public-school headmasters and headmistresses off their perches.现在有一种推翻公立学校校长权威性的趋势。Not any more, mocked the crows from shady pine bough perches.时光不再啊, 乌鸦栖息在成荫的松树主枝上,向我发出嘲笑.The birds were hop...